Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a0c68b0c2f23bc38fccf05d6d13510d947da7a51e33872e809d89a3eb8913af4' 
  AND token = 'B1n3lCRJKj54czYbktDErSMUXKs4RVI/QnF+lCF60lY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}